Improvement in dampers for stoves and furnaces



J. S. BRADY. Damper for Stoves and Furnaces.

No. 214,875. Patented April 29,1879.

WITNESS ,INVENTOR: @y. JX/i Qfiwg ATTORNEYS.

UNITED STATES PATENT OFFICE.

JAMES S. BRADY, OF OLINTONDALE, NEW YORK.

IMPROVEMENT IN DAMP'ERS FOR STOVES AND FURNACES.

Specification forming part of Letters Patent No. 214,875, dated April29, 1879; application filed December 13,1878.

To all whom it may concern:

Be it known that I, JAMES S. BRADY, of Olintondale, in the county ofUlster and State of New York, have invented a new and Improved AutomaticDamper for Stoves and Furnaces, of which the following is aspecification.

The object of my invention is to furnish stoves and heaters withautomatically-acting devices connected with the dampers, where by thedraft will be regulated by the heat of the stove; and the inventionconsists in certain novel details of construction, whereby the parts maybe readily and accurately adjusted, as more particularly set forth inconnection with the drawings, wherein Figure 1 is a front elevation ofmy automatic devices in connection with a stove. Fig. 2 is an elevationat right angles to Fig. 1, with the stove-pipe broken open.

Similar letters of reference indicate corresponding parts.

The metal stove A and its pipe a may be of any desired character, andthe devices constituting my invention are applied in connection with thedamper b in pipe at. The projecting end of the spindle of damper b issquared, and carries a lever-arm, c, and the arm 01, that is weighted,so as to retain damper I) open normally. The arms 0 and d are retainedin place by a nut at the outer end of the spindle. e is a crank-lever,fulcrumed on a stud, f, that is attached to pipe at a suitable distanceabove the damper, the longer arm of which lever 6 has upon its outer enda headed pin, g, for connection of the link h, that is also connected toarm a of the damper.

The connection of link It to arm 0 is made by means of a pin on h, thatenters either one of the slots in arm 0, and this pin has a T-head,which, when the link is attached to lever e, prevents separation; butthe parts may be disconnected by turning link it until the T-head is inline with the slots.

The connection between 6 and his made by open slots in h, into any oneof which the pin g may enter, according to the adjustment that isrequired; and to facilitate manipulation, the outer end of h is formedas a handle, by which it can be lifted and the adjustment made.

To the short arm of lever e is connected one end of a vertical rod, 13,the. lower end of which rod is rigidly connected to the rim of thestove, base, or bottom plate by means of a coupling, k, that is slottedto sit on the rim of the stove, and held in place by a setscrew.

The rod passes through coupling k, and carries a nut at the upper andunder side of k, so that the length of rod 45 can be adjusted, and thenthe parts clamped.

By using the coupling device it the mechanism can be attached to anystove without boring holes or cutting any part.

The coupling is is also provided with a setscrew, 1, for clamping rod twhen the nuts are not used; and in some cases the rod 5 may be moreconveniently attached to the floor instead of the base.

The parts named being connected as described, and adjusted so thatdamper b is held open by weighted arm d, the draft through the stove isthen free, and the fire in the stove can burn briskly.

'When the stove and pipe become heated the expansion will be from thebase upward,

and rod t, being comparatively cool and of heavier metal than the stove,will not expand, so that the effect will be to swing lever e, and bylink it and arm 0 close the damper. This will be done in proportion tothe heat of the fire, which, ifsufficient, may close the damperentirely.

By adjustment of the parts as mentioned, the fire can be checked sooneror later, as is desired, and the weighted armwill operate to open thedamper as the stove cools.

The connection of the link h to lever 0 may be made by a thumb-screwpassing through a slot in the link, instead of the loose connectionshown.

The automatic regulating mechanism described may be used in connectionwith steamheating apparatus, either for regulating the fire at theboiler or governing the admission of steam to a heating coil. I do notlimit myself in this particular.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patent- In an automatic damper-regulator, substantially as described, the slotted arm 0 and link 11, the link h beingprovided with a, T-headed pin and connected removably with the lever e,substantially as and for the purposes set forth,

JAMES SMITH BRADY. Witnesses:

GEO. D. WALKER, U. SEDGWICK.

